10+ Customer Engineer Interview Questions and Answers

I would follow the standard protocol for handling a dead machine.

• I would first confirm that the machine is indeed dead and not just malfunctioning.

• I would then follow the standard protocol for handling dead machines, which may include checking for any visible damage or signs of wear and tear.

• If necessary, I would consult with other engineers or technical experts to determine the best course of action for repairing or replacing the machine.

• Throughout the process, I would docum...read more

I have worked with various types of motors including AC motors, DC motors, stepper motors, and servo motors.

• AC motors: Used in household appliances and industrial applications.

• DC motors: Commonly found in electric vehicles and robotics.

• Stepper motors: Used in precision positioning systems and 3D printers.

• Servo motors: Found in robotics and automation for precise control.

I am currently handling a portfolio of 15 elevators.

• Currently managing 15 elevators in various buildings

• Responsible for maintenance, repairs, and upgrades

• Regularly communicate with building owners and tenants

• Provide technical support and troubleshooting services

• Track performance metrics and ensure compliance with safety regulations

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers work on the principle of electromagnetic induction.

• They consist of two or more coils of wire, known as windings, which are wound around a common magnetic core.

• The primary winding is connected to the input voltage source, while the secondary winding is connected to the load.

• When an alternating current flows through the primary winding, it creat...read more

A PNP transistor symbol consists of an arrow pointing inward, while an NPN transistor symbol consists of an arrow pointing outward.

• PNP transistor symbol has an arrow pointing inward

• NPN transistor symbol has an arrow pointing outward

A bridge rectifier is an electronic circuit that converts alternating current (AC) to direct current (DC).

• A bridge rectifier consists of four diodes arranged in a bridge configuration.

• It rectifies the AC input voltage by allowing current to flow in only one direction.

• During the positive half-cycle of the AC input, two diodes conduct and during the negative half-cycle, the other two diodes conduct.

• This results in a pulsating DC output that is then filtered to obtain a smoother...read more

An elevator works by using a system of pulleys, counterweights, and a motor to move the elevator car up and down within a shaft.

• Elevators have a motor that drives a pulley system to move the elevator car.

• Counterweights are used to balance the weight of the elevator car and reduce the load on the motor.

• Safety mechanisms such as brakes and sensors are in place to ensure safe operation.

• Elevators are controlled by buttons inside the car and on each floor to select the desired des...read more

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).

• Rectifiers are commonly used in power supplies and electronic devices.

• They consist of diodes that allow current to flow in only one direction.

• Half-wave and full-wave rectifiers are two common types of rectifiers.

• Rectifiers can be used to convert AC power from the mains to DC power for electronic devices.

• They are also used in battery charging circuits and in converting AC power to...read more

Identify types of requests in a log file

• Look for keywords like GET, POST, PUT, DELETE

• Check for status codes like 200, 404, 500

• Identify specific endpoints or URLs

AC and DC are types of electrical current.

• AC stands for alternating current and changes direction periodically.

• DC stands for direct current and flows in one direction only.

• AC is used in household appliances and power grids while DC is used in batteries and electronic devices.

• AC voltage can be easily transformed using a transformer while DC voltage cannot be transformed without a converter.

An electrical motor is a device that converts electrical energy into mechanical energy.

• Uses electromagnetic fields to generate motion

• Common types include DC motors and AC motors

• Can be classified based on construction (e.g. brushed, brushless) or application (e.g. servo, stepper)

• Examples: induction motor, synchronous motor, brushed DC motor, brushless DC motor

Troubleshooting shooting method involves identifying and resolving issues in a systematic manner.

• Start by gathering information about the issue and its symptoms

• Identify possible causes and narrow down the root cause

• Develop a plan to address the issue step by step

• Test solutions and verify if the issue is resolved

• Document the troubleshooting process for future reference

Hardware and network problems can be caused by various factors.

• Identify the specific hardware or network component causing the issue

• Check for loose connections or damaged hardware

• Run diagnostic tests to pinpoint the problem

• Update drivers and firmware

• Check network settings and configurations

• Restart or reset the hardware or network device

• Consult technical documentation or seek expert help if necessary

MCB stands for Miniature Circuit Breaker.

• MCB is an electrical switch that automatically interrupts the flow of current in an electrical circuit during an overload or short circuit.

• It is a type of circuit breaker that is commonly used in residential and commercial buildings to protect electrical circuits from damage.

• MCBs are designed to trip and disconnect the circuit when excessive current flows through it, preventing overheating and potential fire hazards.

• They are compact in...read more

VFD's (Variable Frequency Drives) are electronic devices used to control the speed and torque of electric motors.

• VFD's convert fixed frequency AC power to variable frequency power, allowing precise control of motor speed.

• They are commonly used in industrial applications to save energy, improve motor performance, and reduce wear and tear.

• VFD's consist of three main components: rectifier, DC bus, and inverter.

• The rectifier converts AC power to DC power, the DC bus stores the co...read more